body {
    background-color: #000;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    #app {
        position: relative;
        width: 900px;
        height: 600px;
        background-color: #333;
        canvas[id^='canvas'] {
            position: absolute;
            left: 0;
            top: 0;
        }
        canvas[id="canvas-straw"] {
            z-index: 2;
        }
    }
}
